Many malfunctions in the electrical system are caused by poor harness(s) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Check the following conditions:
Check for damaged harness and terminals: contact resistance, oxidation, bent or broken terminals.
Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection
Use a suitable male pin to ensure that contact in sockets is good. The pin should remain in position when pulled gently.
Has a problem been found?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
System OK
IG KEY : ON, Engine: ON
FLUID TEMPERATURE SENSOR C03 Connoctor :Disconnect
Measure voltage between FLUID TEMPERATURE SENSOR C03 Terminal 1 and GND with MULTIMETER.
Channel1 Prove(+) :FLUID TEMPERATURE SENSOR output signal C03 Terminal 1
Channel1 Prove(-) : Battery(-).
Specification : Approx. 5V
Is approx. 5V measured ?
YES
Go to Components Inspection
NO
Verify line Open or Short between PCM C33-2 Terminal 25 and C03 Terminal 1.
Repair and then verify Verification Veh. Repair procedure.
If line is normal, go to Controller inspection
